Making Wave Texture Material Like Cardboard Flute
That can be this setting:

Using:

We have four input parameters:
Scale: to control the scale of the pattern
Length: the wave length
Interval: threshold between each line
Height: the height of the wave
Then,
From X (scaled by scale * length), the sine.
From Y (scaled, reduced to the interval, recentered around 0 and multiplied by the height) the value to compare to the sine.